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Updated: Mar 7, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
Classes of Hydrodynamic and Magnetohydrodynamic Turbulent Decay
Axel Brandenburg1,2,3,4, Tina Kahniashvili5,6,7
1Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colorado 80303, USA.
Abstract:
We perform numerical simulations of decaying hydrodynamic and magnetohydrodynamic turbulence. We classify our time-dependent solutions by their evolutionary tracks in parametric plots between instantaneous scaling exponents. We find distinct classes of solutions evolving along specific trajectories toward points on a line of self-similar solutions. These trajectories are determined by the underlying physics governing individual cases, while the infrared slope of the initial conditions plays only a limited role. In the helical case, even for a scale-invariant initial spectrum (inversely proportional to wave number k), the solution evolves along the same trajectory as for a Batchelor spectrum (proportional to k^{4}).
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